While the first day of fall isn't until September 22, signs of fall have made themselves known in the Foothills.

Aside from yellowing leaves and cooler temperatures, the Foothills was issued it's first official frost advisory earlier this week.

Christa Michailuck, parks manager for the Town of Okotoks, says there's a simple way people can try to protect their vegetables.

"Most people will be concerned about frost these nights for their tomatoes and other vegetables they have in the garden and the best way to protect them against frost is to cover them with an old sheet or something of that nature, just don't forget to remove it again in the morning."

Michailuck says sheets should be removed after sunrise as sunrise is typically the coldest part of the day and that's when frost damage is more likely to occur.

She adds there's a few steps people should've started about a month ago to help prepare their trees for the upcoming winter.

"Trees and shrubs, especially your newly planted ones, the best way to protect those against frost is to stop watering and fertilizing about the beginning of August so they stop putting out vigorous new growth to give it time to harden off to winter. It's a little late for this time of year to stop doing that but keep that in mind for next year."

Most leafy vegetables are susceptible to frost while root vegetables can usually stay in the ground until it's frozen.